chalaza
Americannoun
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chalazas,
plural
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chalazae
plural
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Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
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Botany. the point of an ovule or seed where the integuments are united to the nucellus.
noun
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one of a pair of spiral threads of albumen holding the yolk of a bird's egg in position
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the basal part of a plant ovule, where the integuments and nucellus are joined
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chalazae
plural
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One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
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The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of chalaza
1695–1705; < New Latin < Greek: hail, lump
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Hence, by ascertaining the position of the micropyle and chalaza, the two extremities of the embryo can in general be discovered.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various
Seeds usually three or four, large, short, plump, blunt, notched; chalaza oval, depressed, indistinct; raphe a broad groove.
From Manual of American Grape-Growing by U. P. Hedrick
Seeds two to four, small, notched, short, plump, with very short beak; chalaza narrowly oval, depressed, indistinct; raphe usually a groove, sometimes distinct.
From Manual of American Grape-Growing by U. P. Hedrick
The hilum or base of the seed, and the chalaza or base of the nucellus are united by means of the raphe r.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various
The pollen-tube does not penetrate the ovule through the micropyle but enters at the opposite end—the chalaza.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" by Various
A pair of fibrous strands called chalazae anchor the yolk inside the egg, and Geary figured that sundering them would allow the yolk to float to the center.
From New York Times ● Oct. 14, 2012
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
